Oil-well pump



T. J. BARGER.

OIL WELL PUMP. APPLlCATiON FILED APR- 7. 1921.

Patented Mar. 7, 1922.

UNITED STATES PATENT OFFICE.

TOM J. BARGER, OI OILTON, OKLAHOMA.

OIL-WELL PUMP.

Application 'filed April 7,

To all whom it may concern:

Be it known that 1, Tom: J. BARGER, a citizen of the United States, residing at Oilton, in the county of Greek and State of Oklahoma, have invented certain new and useful Improvements in Oilell Pumps, of which the following is a specification.

This invention relates to pumps for oil wells and other similar wells; and it con sists in providing the pump with a sand trap as hereinafter fully described and claimed.

In the drawings, Figure 1 is a vertical section of the upper part of an oil well pump constructed according to this invention. Fig. 2 is a cross-section, taken on the line 2-2 in Fig. 1.

The barrel 4 of the pump is provided with a slidable plunger 5. This plunger has cup leathers 6, and a delivery valve 7 of any approved construction. The lower end portions of the pump barrel with the foot valve, strainer, and other parts, are not shown as they are the same as those commonly used in well pumps.

A stuffing-box 8 is provided at the upper part of the pump barrel, and its packing 9 is kept tight by a gland 10. The stallingbox has a plug end portion 12 which is driven into the upper end portion of the barrel, and is kept tight by leather packing 14. This plug can be removed and replaced with facility. A delivery pipe 15 is secured to the casing 16 of the delivery valve 7, and is slidable in the stufling-box S. A valve cage 18 is secured to the upper end portion of the pipe 15, and is provided with a discharge valve 19. The cage 18 has one or more lateral openings 20 for the discharge of sand and liquid. The delivery valve casing 16 has also lateral openings, 21, which are constantly in communication with the annular space between the pump barrel 4 and the delivery pipe 15. A rod 24 for operating the pump plunger is secured to he upper end portion of the valve cage 18.

A sand trap 25 is secured to the pump barrel 4, and is preferably a cylinder the lower end portion of which is secured on a collar 26 on the lower part of the pump barrel.

This cylinder or sand trap extends vertically above the top of the pump barrel, and 27 is a discharge pipe secured to the upper end portion of the said trap by a connecting socket 28. The discharge pipe 27 is smaller in diameter than the sand trap Specification of Letters Patent.

Patented Mar. '7, 1922.

1921. Serial No. 459,426.

cylinder, and the discharge valve cage 18 works in its lower end portion. The discharge pipe 27 is preferably larger in diameter than the pump barrel 4, and it permits the pump plunger 5 and all the parts which slide with it, together with the stuff ing-box, to be raised by the pump rod 24, through the discharge pipe 27 without raising the said pipe 27 and the sand trap 25.

The sand which passes laterally through the openings 21 is agitated with the oil in the pump barrel around the pipe 15, so that the sand has little opportunity to settle in the annular space between these parts. The occasional removal of the plunger 5 gets rid of all sand in the pump barrel, and enables the plunger to be repaired, and the packing to be tightened, without removing the whole pump.

The pump plunger is operated in the usual manner, and the oil or other liquid is forced upwardly through the delivery pipe 15. The upper discharge valve 19 prevents any sand which is discharged with the oil from passing backwardly into the pump barrel. When sand passes throu h the valve 19 with the oil, it is disciarged laterally through the openings 20 of the valve cage, and sinks by gravity into the sand trap or cylinder 25. This cylinder provides a receptacle for the accumulation of considerable sand where it will do no harm, and will not interfere with the working of the pump.

The oil which passes upwardly through the discharge pipe is free from sand. The sand in thesand trap can be removed from time to time, when it is necessary to raise the pump out of the well.

hat I claim is:

In an oil well pump, a pump barrel, a sand trap having its lower part secured around the lower part of the pump barrel and having an oil discharge pipe at its upper end above the pump barrel, a pump plunger slidable in the pump barrel, a delivery valve secured to the top of the pump plunger, an oil delivery pipe secured above'the delivery valve, an annular space being provided be tween the pump barrel and the delivery pipe which is constantly in communication with the delivery pipe and which has no direct communication with the sand trap, a stuifing-box for the delivery pipe comprising a straight cylindrical plug the lower end portion of which is provided with packing externally and secured in the upper end porhaving an outlet for oil and for sand which is constantly in direct communication with the lower end of the discharge pipe and the 10 upper end of the sand trap.

In testimony whereof I have affixed my signature. TOM J BARGER. 

